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ARP 6 -The Bearpaw Low-surface brightness spiral


elpajare

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This galaxy is very visited at this time of year. What many ignore is that it is number 6 of the Arp catalog of peculiar galaxies.

This especially, is classified as Low-surface brightness spiral and the challenge according to the authors of the book The Arp Atlas of Peculiar Galxies is to detect the horsehoe-shaped ring with a mottled bar inside.

I have tried, at least

This photo has been taken with 15 exposures of 25 "with a combination TSoptics RC 8" + Risingcam IMX294 C non cooled + UVIR filter with the Risingtech capture software and treated with Startools

864629894_ARP6NGC2537BEARPAWGXLYNX15X25A40M33W7NWS3-1RC8IMX294UVIR.thumb.jpg.c53878d553d7e66f43c0e43e93d8bcd2.jpg662865970_ARP6NGC2537BEARPAWGXLYNXINVERTED5X25A40M33W7NWS3-1RC8IMX294UVIR.thumb.jpg.eca3aa1f4eeabfd3ba7cf5ada2e66bf6.jpg

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Nice to see a colour shot, mine is mono. Some folk think it looks more like a jelly fish than a paw.

You also have 2537A to the left and beyond that is PGC 23092 (mag 16) and at the top is PGC 23015 (mag 16). Between 23092 and 2537A is also PGC 2273845 (Mag 17). Not far away is a faint grey dot which would correspond to PGC 3131106 (mag 18). I suspect there are a few more PGCs in this shot - impressive.

Mike

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Thank you both for the comments

Seen in real color this galaxy looks more like a jellyfish than a bear footprint. You're right

There is no secret in this shot, the 8 "for a telescope is very common in EEVA equipment and the camera is of Chinese origin with an IMX294 sensor without cooling very current too. I have applied flats and darks and I have taken the picture with everyone the default parameters with 25 "exposure which is what I always use for this type of object

I was fortunate to have a night with good seeing and the Startools treatment helped to recover the smallest details.

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